The new Motor Trend Truck Trend issue has summed up alot of the other Truck magazine articles on concept and Factory Sport Trucks. It is a pretty good issue if you like Trucks.

Silverado SS- Factory and Reg Cab concept.
Dodge SRT-10
Concept Lightning
It also has a Harley Ford/ Hemi/ SS silverador Shootout.
The numbers are pretty accurate from what I have seen Harley and Hemis run in real life, although no one around here has run a SS.
Thought you truck freaks would like to know